Finding the Fourth Proportional to 10,915.69, 16,374.91 and 3,519.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,915.69 : 16,374.91 = 3,519.98 : x
2. Step 2: Convert to fraction form
   10,915.69/16,374.91 = 3,519.98/x
3. Step 3: Cross multiply
   10,915.69x = 16,374.91 × 3,519.98
4. Step 4: Simplify right side
   10,915.69x = 57,639,355.70
5. Step 5: Solve for x
   x = 57,639,355.70/10,915.69
6. Step 6: Final answer
   x = 5,280.42